Together with a third series a new body became available. Volga station wagon had its own index - GAZ M22 (since 1964 - GAZ 22).
GAZ M22 - basic modification,
GAZ M22A - prototype panel van,
GAZ M22B (М22Б) - ambulance,
GAZ M22BK (М22БК) - ambulance with more powerful 85hp engine,
GAZ M22BKJu (М22БКЮ) - M22BK for tropical countries,
GAZ M22BM (М22БМ) - export version of M22BK,
GAZ M22BMJu (М22БМЮ) - export version of M22BKJu,
GAZ M22G (М22Г) - export version with 75hp,
GAZ M22GJu (М22ГЮ) - M22G for tropical countries,
GAZ M22K - export version with 75hp (I don't know how it differs from M22G),
GAZ M22KE (М22КЭ) - M22K with shielded electrics.
Since 1965:
GAZ 22V (22В) - basic modification,
GAZ 22E (22Е) - export ambulance,
GAZ 22M - export 85hp modification,
GAZ 22MB (22МБ) - export ambulance (no idea how did it differ from 22E, maybe an 85hp engine),
GAZ 22MJu (22МЮ) - 22M for tropical countries,
GAZ 22N (22Н) - export RHD modification,
GAZ 22NJu (22НЮ) - 22N for tropical countries.
All GAZ 22 cars had a third series grille, although first prototypes were made with a second series ones.